Physics

Problem

A satellite moves in a circular orbit of radius

4.0\times10^{7}\,\text{m}

around a planet of mass

4.0\times10^{24}\,\text{kg}

. What is the satellite’s total mechanical energy per unit mass? a)

+3.3\times10^{6}\,\text{J\,kg}^{-1}

-3.3\times10^{6}\,\text{J\,kg}^{-1}

-6.7\times10^{6}\,\text{J\,kg}^{-1}

+6.7\times10^{6}\,\text{J\,kg}^{-1}